Episode #0754

[It's up to the first poster to come up with a set up, and then each following post will either complete it or fill in the blank(s). And, as always, whoever posts the set up is certainly allowed to post their own completion/fill in as a follow up.]

Set-up:
L: "Yes dear, I know you'd like to know what this place I'm taking you to is, what it's like, I'm sure everyone would like to know; even 40 years from now people will still want to know, but mummy must keep it a secret, alright?"
D: "It's a _________, isn't it?"